<template>
    <div class="app-container">
        <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch"
                 label-width="68px">
                        <el-form-item label="课程名" prop="name">
                            <el-input
                                    v-model="queryParams.name"
                                    placeholder="请输入课程名"
                                    clearable
                                    @keyup.enter.native="handleQuery"
                            />
                        </el-form-item>
                        <el-form-item label="上课教师" prop="teacherid">
                            <el-input
                                    v-model="queryParams.teacherid"
                                    placeholder="请输入上课教师"
                                    clearable
                                    @keyup.enter.native="handleQuery"
                            />
                        </el-form-item>
                        <el-form-item label="选课学生" prop="studentid">
                            <el-input
                                    v-model="queryParams.studentid"
                                    placeholder="请输入选课学生"
                                    clearable
                                    @keyup.enter.native="handleQuery"
                            />
                        </el-form-item>
            <el-form-item>
                <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
                <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
            </el-form-item>
        </el-form>

        <el-row :gutter="10" class="mb8">
            <el-col :span="1.5">
                <el-button
                        type="warning"
                        plain
                        icon="el-icon-download"
                        size="mini"
                        @click="handleExport"
                        v-hasPermi="['system:cou_info:export']"
                >导出
                </el-button>
            </el-col>
          <el-button
            type="info"
            icon="el-icon-upload2"
            size="mini"
            @click="handleImport"
          >导入</el-button>
            <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
        </el-row>

        <el-table v-loading="loading" :data="infoList" @selection-change="handleSelectionChange">
            <el-table-column type="selection" width="55" align="center"/>
                    <el-table-column label="课程名" align="center" prop="name"/>
                    <el-table-column label="上课教师" align="center" prop="teacherid"/>
                    <el-table-column label="班级" align="center" prop="classid"/>
                    <el-table-column label="选课学生" align="center" prop="studentid"/>
        </el-table>

        <pagination
                v-show="total>0"
                :total="total"
                :page.sync="queryParams.pageNum"
                :limit.sync="queryParams.pageSize"
                @pagination="getList"
        />

      <!-- 用户导入对话框 -->
      <el-dialog :title="upload.title" :visible.sync="upload.open" width="400px">
        <el-upload
          ref="upload"
          :limit="1"
          accept=".xlsx, .xls"
          :headers="upload.headers"
          :action="upload.url + '?updateSupport=' + upload.updateSupport"
          :disabled="upload.isUploading"
          :on-progress="handleFileUploadProgress"
          :on-success="handleFileSuccess"
          :auto-upload="false"
          drag
        >
          <i class="el-icon-upload"></i>
          <div class="el-upload__text">
            将文件拖到此处，或
            <em>点击上传</em>
          </div>
          <div class="el-upload__tip" slot="tip">
            <el-checkbox v-model="upload.updateSupport" />是否更新已经存在的用户数据
            <el-link type="info" style="font-size:12px" @click="importTemplate">下载模板</el-link>
          </div>
          <div class="el-upload__tip" style="color:red" slot="tip">提示：仅允许导入“xls”或“xlsx”格式文件！</div>
        </el-upload>
        <div slot="footer" class="dialog-footer">
          <el-button type="primary" @click="submitFileForm">确 定</el-button>
          <el-button @click="upload.open = false">取 消</el-button>
        </div>
      </el-dialog>
    </div>
</template>

<script>
    import {getInfo, listInfo, importTemplate} from "@/api/system/cou_info";
    import { getToken } from "@/utils/auth";

    export default {
        name: "cou_Info",
        data() {
            return {
                // 遮罩层
                loading: true,
                // 选中数组
                ids: [],
                // 非单个禁用
                single: true,
                // 非多个禁用
                multiple: true,
                // 显示搜索条件
                showSearch: true,
                // 总条数
                total: 0,
                // VIEW表格数据
                    infoList: [],
                // 弹出层标题
                title: "",
                // 是否显示弹出层
                open: false,
                // 查询参数
                queryParams: {
                    pageNum: 1,
                    pageSize: 10,
                    name: null,
                    teacherid: null,
                    studentid: null
        },
            // 表单参数
            form: {
            }
        ,
              upload: {
                // 是否显示弹出层（用户导入）
                open: false,
                // 弹出层标题（用户导入）
                title: "",
                // 是否禁用上传
                isUploading: false,
                // 是否更新已经存在的用户数据
                updateSupport: 0,
                // 设置上传的请求头部
                headers: { Authorization: "Bearer " + getToken() },
                // 上传的地址
                url: process.env.VUE_APP_BASE_API + "/system/cou_info/importData"
              },
            // 表单校验
            rules: {
                        name: [
                        {
                            required: true, message: "课程名不能为空", trigger: "blur" }
                    ],
                        teacherid: [
                        {
                            required: true, message: "上课教师不能为空", trigger: "blur" }
                    ],
                        studentid: [
                        {
                            required: true, message: "选课学生不能为空", trigger: "blur" }
                    ]
            }
        }
            ;
        },
        created() {
            this.getList();
        },
    methods: {
      handleImport() {
        this.upload.title = "用户导入";
        this.upload.open = true;
      },
      // 文件上传中处理
      handleFileUploadProgress(event, file, fileList) {
        this.upload.isUploading = true;
      },
      /** 下载模板操作 */
      importTemplate() {
        this.download('system/cou_info/importTemplate', {
        }, `user_template_${new Date().getTime()}.xlsx`)
      },
// 文件上传成功处理
      handleFileSuccess(response, file, fileList) {
        this.upload.open = false;
        this.upload.isUploading = false;
        this.$refs.upload.clearFiles();
        this.$alert(response.msg, "导入结果", { dangerouslyUseHTMLString: true });
        this.getList();
      },
// 提交上传文件
      submitFileForm() {
        this.$refs.upload.submit();
      },
        /** 查询VIEW列表 */
        getList() {
            this.loading = true;
            listInfo(this.queryParams).then(response => {
                this.infoList = response.rows;
                this.total = response.total;
                this.loading = false;
            });
        },
        // 取消按钮
        cancel() {
            this.open = false;
            this.reset();
        },
        // 表单重置
        reset() {
            this.form = {
                    name: null,
                    teacherid: null,
                    studentid: null
        }
            ;
            this.resetForm("form");
        },
        /** 搜索按钮操作 */
        handleQuery() {
            this.queryParams.pageNum = 1;
            this.getList();
        },
        /** 重置按钮操作 */
        resetQuery() {
            this.resetForm("queryForm");
            this.handleQuery();
        },
        // 多选框选中数据
        handleSelectionChange(selection) {
            this.ids = selection.map(item => item.name)
            this.single = selection.length !== 1
            this.multiple = !selection.length
        },
        /** 新增按钮操作 */
        handleAdd() {
            this.reset();
            this.open = true;
            this.title = "添加VIEW";
        },
        /** 修改按钮操作 */
        handleUpdate(row) {
            this.reset();
            const name =
            row.name || this.ids
            getInfo(name).then(response => {
                this.form = response.data;
                this.open = true;
                this.title = "修改VIEW";
            });
        },
    /** 导出按钮操作 */
    handleExport()
    {
        this.download('system/cou_info/export', {
            ...this.queryParams
        }, `info_${new Date().getTime()}.xlsx`)
    }
    }
    }
    ;
</script>
